KEVOS® MAKEOS · Engineering
Hole and Shaft Clearance Limits
What clearance or interference can occur at the size limits?
Calculate the worst-case diametral clearance range from explicitly supplied hole and shaft limits.
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How this tool works
Inputs, units and where to find them
| Input | Unit | Typical source |
|---|---|---|
| Minimum hole diameter | mm | Lower permitted hole size on the current drawing. |
| Maximum hole diameter | mm | Upper permitted hole size on the current drawing. |
| Minimum shaft diameter | mm | Lower permitted shaft size on the current drawing. |
| Maximum shaft diameter | mm | Upper permitted shaft size on the current drawing. |
Method and formulas
- Minimum clearance = minimum hole − maximum shaft.
- Maximum clearance = maximum hole − minimum shaft.
- Positive values are clearance; negative values are interference. Example limits give 0.007 to 0.041 mm diametral clearance.
Limitations
- Uses size limits only; no ISO/ANSI fit-class values are embedded.
- Form, position, finish, coatings, compliance and operating temperature may change assembly behaviour.
- Example values are illustrations. Replace them with values for your actual task.
Typical uses
- limits fits
- interference
- dimensional tolerance
Who it is for
- Mechanical designers
- Inspectors
What you get
- Minimum signed clearance
- Maximum signed clearance
- Size-only classification
Interpreting the result
- Check limit order and assess geometry and thermal conditions before approving the fit.
References
- Machinery’s Handbook, 29th edition (Industrial Press, 2012), printed pp. 628–631. Topic reference; no source tables or recommended settings are reproduced.
- NPL, Fundamental Good Practice in Dimensional Metrology, GPG 80 — https://eprintspublications.npl.co.uk/3360/1/mgpg80.pdf
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